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前端学习——ionic/AngularJs——获取验证码倒计时按钮

 按钮功能为:点击“获取验证码”——按钮不可用-设置倒计时-60秒后重新获取。

 

代码借鉴于:http://plnkr.co/edit/Swj82MpJSix3a47jZRHP?p=preview

主要实现原理:点击后,设置一个$interval,每一秒更改一次剩余时间,并依赖Angular数据绑定实时显示在页面中。设置一个$timeout,60秒后将按钮初始化到可用状态。

实现代码:

(1)js代码,设置成一个directive以便多次调用。

angular.module(‘winwin‘).directive(‘timerbutton‘, function($timeout, $interval){
    return {
        restrict: ‘AE‘,
        scope: {
            showTimer: ‘=‘,
            timeout: ‘=‘
        },
        link: function(scope, element, attrs){
            scope.timer = false;
            scope.timeout = 60000;
            scope.timerCount = scope.timeout / 1000;
            scope.text = "获取验证码";

            scope.onClick = function(){
                scope.showTimer = true;
                scope.timer = true;
                scope.text = "秒后重新获取";
                var counter = $interval(function(){
                    scope.timerCount = scope.timerCount - 1;
                }, 1000);

                $timeout(function(){
                    scope.text = "获取验证码";
                    scope.timer = false;
                    $interval.cancel(counter);
                    scope.showTimer = false;
                    scope.timerCount = scope.timeout / 1000;
                }, scope.timeout);
            }
        },
        template: ‘<button on-tap="onClick()" class="button button-calm xgmm-btn" ng-disabled="timer"><span ng-if="showTimer">{{ timerCount }}</span>{{text}}</button>‘
    };
});

  (2)html代码

 <timerbutton show-timer="false">获取验证码</timerbutton>

  

实现效果:

(1)点击之前

  技术分享

(2)点击之后

  技术分享

前端学习——ionic/AngularJs——获取验证码倒计时按钮